Home / 212,423.18-318,634.72-79,313.82

Finding the Fourth Proportional to 212,423.18, 318,634.72 and 79,313.82

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Solution

The fourth proportional to 212,423.18, 318,634.72 and 79,313.82 is: 118,970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,423.18 : 318,634.72 = 79,313.82 : x
  2. Step 2: Convert to fraction form
    212,423.18/318,634.72 = 79,313.82/x
  3. Step 3: Cross multiply
    212,423.18x = 318,634.72 × 79,313.82
  4. Step 4: Simplify right side
    212,423.18x = 25,272,136,827.83
  5. Step 5: Solve for x
    x = 25,272,136,827.83/212,423.18
  6. Step 6: Final answer
    x = 118,970.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.